... -38T/15T Motorcycle Sprocket set A.Factory price B.45# steel,A3 steel C.420/420h/428/428h/520 DEAR SIRS, HERE ... .Chain: 415,420, 428,428H,520 etcMaterial: 1045 High Carbon Steel(S45C, 45#), SS400(Q235) Main Market India, Indonesia, Malaysia, Vietnam ...